12 Bone-Chilling Serial Killer Documentaries on Netflix Now

This captivating three-part docuseries tells the story of a prolific serial killer in South Korea who, between 2003 and 2004, took the lives of at least 20 victims. Preying on wealthy older adults and sex workers, he beat victims with a hammer and dismembered some of their bodies. The police didn't even know they were looking for a serial killer until they found a pair of matching shoe prints at the gruesome scenes of his crimes.

Watch "The Raincoat Killer: Chasing a Predator in Korea" on Netflix.